木屑基介孔活性炭的制备及其对刚果红的高效吸附
Preparation of wood chip based mesoporous activated carbon and its efficient adsorption of Congo red
张诗苑 1闫宇星 1齐有 2曹青1
作者信息
- 1. 太原理工大学化学学院,山西太原 030024
- 2. 太原理工大学化学工程与技术学院,山西太原 030024
- 折叠
摘要
以废弃生物质木屑作为原料,K2C2O4为活化剂,鸡蛋壳为模板剂制备介孔活性炭.采用扫描电镜(SEM)、X射线光电子能谱仪(XPS)和N2吸附-脱附等温线等方法对活性炭的结构进行表征,并考察了活性炭对刚果红(CR)染料的吸附性能.结果表明,当木屑与K2C2O4的质量比为1∶1.5,添加与木屑等量的鸡蛋壳,活化温度为800℃、活化时间为2 h时,所制备的活性炭AC-1比表面积为2009 m2/g,介孔率可达70.5％.AC-1对CR的最佳吸附容量高达862.1 mg/g.吸附过程是以化学吸附为主的单层复合吸附过程,符合准二级动力学模型和Langmuir等温模型.
Abstract
Using waste biomass sawdust as raw material,K2C2O4 as activator and egg shell as template,mesoporous activated carbon was prepared.The structure of activated carbon was characterized by scan-ning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS)and N2 adsorption-desorption experiments,and the adsorption performance of activated carbon for Congo red dye was investigated.The results show that when the mass ratio of sawdust to K2C2O4 is 1∶1.5,add an equal amount of egg shell to sawdust,the activation temperature is 800 ℃,and the activation time is 2 h,the specific surface area of AC-1 is 2 009 m2/g,and the mesoporous rate is 70.5％.The optimal adsorption capacity of AC-1 for CR is as high as 862.1 mg/g.The adsorption process is a single-layer composite adsorption process dominated by chemical adsorption.It conforms to the quasi-second-order kinetic model and Langmuir isotherm model.
关键词
K2C2O4/鸡蛋壳/介孔活性炭/吸附/刚果红Key words
K2C2O4/egg shell/mesoporous activated carbon/adsorption/Congo red引用本文复制引用
基金项目
山西省重点研发计划高新技术领域项目(201703D121037-1)
出版年
2024
NETL
NSTL
万方数据